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exploration for a narrow residential street. Narrow streets
require a narrower right-of-way and are less expensive than wider
streets. They also create fewer ecological impacts,
encourage slower traffic speeds and are easier to shade with street
trees. In this exploration the right-of-way is reduced to
15 metres (50') both by decreasing the roadway dimension to 6 metres
(20') and by grouping uses. Unpaved 3.25 metre (11') shoulders
provide space for street trees, a parking lane, and shallow
roadside swales which carry surficial drainage to nearby retention
swales. Further right-of-way reduction is achieved by placing
the 1.25 metre (4') sidewalk at the property line, eliminating the
grass boulevard traditionally found at this location. The incorporation
of surficial drainage eliminates the need for a curb and gutter
system. Flush curbs take the place of raised curbs. These
curbs allow water to drain from the roadway directly into the roadside
swales, and prevent the asphalt edge from crumbling. Note
the aerial joint utility lines in the lanes indicated by wooden
power. |
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